KDZD300A cable outer sheath loop current grounding tester is applicable to the following specific measurement scenarios:
Detection of substation cable grounding system
Measure the circulating current of the metal sheath of high-voltage cable (such as aluminum sheath and copper shielding layer) in the single-end or cross interconnection grounding mode, and judge whether there are multipoint grounding, insulation damage or poor grounding faults.
Plant service power and transmission cable monitoring
Regular patrol inspection shall be carried out for the grounding current of the outer sheath of the power cable at the outlet of the generator, the low voltage side of the main transformer and the plant power distribution system to prevent cable overheating, insulation aging and other problems caused by large loop flow.
Operation and maintenance of urban underground cable tunnel/pipe gallery
Quickly detect the outer sheath grounding current and harmonic components of densely laid cables without interrupting the power supply, and evaluate cable operation and grounding system integrity.
Cable line fault diagnosis and preventive test
By measuring the circulating current, harmonic content (maximum 25 times), total harmonic distortion rate (THD) and other parameters, it can help judge the insulation deterioration of cable sheath, abnormal induced voltage or abnormal grounding circuit.
Analysis of harmonic interference
In places with nonlinear load (such as frequency converter and rectifier equipment), detect harmonic and inter-harmonic current in cable grounding circuit and evaluate its impact on system safety.
Leakage current and frequency monitoring
It is used to troubleshoot the leakage current to the ground caused by the damage of cable outer sheath, and monitor the system frequency stability (20Hz~400Hz wide frequency range, power frequency 45~65Hz high accuracy).
With non-contact, high anti-interference, portable and durable characteristics, the equipment is especially suitable for power operation and maintenance personnel to carry out fast, safe and accurate live detection and state evaluation on site.
The complete set of test equipment for KDCJ-1800kV/180kJ impulse voltage generator is suitable for the following specific test scenarios:
1. High voltage insulator impact withstand voltage test
Conduct lightning impulse full wave (1.2/50 μ s) and operational impulse (250/2500 μ s) withstand tests on ceramic insulators, composite insulators, etc. to verify their insulation performance under overvoltage, in compliance with JB/T 7616 and DL/T 557 standards.
2. Impact test for bushings (such as transformer bushings and wall bushings)
Simulate the impact of lightning or overvoltage on the external insulation and internal structure of the casing, and evaluate whether flashover or breakdown will occur.
3. Impulse test of current/voltage transformers
According to the requirements of GB/T 7449, conduct lightning impulse test on the transformer to verify the reliability of its main insulation and inter turn insulation.
4. Type testing of power transformers and reactors
During the research and development or manufacturing stage, conduct lightning impulse tests on large transformers to verify the insulation strength of windings to ground and between phases.
5. Verification of GIS (gas insulated switchgear) and high-voltage switch components
Perform impulse voltage tests on insulation supports, isolation fractures, and other components in GIS to ensure safe operation under extreme overvoltage conditions.
6. Standard tests of scientific research and certification testing institutions
Used for conducting authoritative testing in high-voltage laboratories that comply with national standards such as GB/T 16927 and GB/T 311, supporting product type testing, sampling, or international certification (such as IEC benchmarking).
✅ This equipment is particularly suitable for use in indoor high-voltage testing halls, and can operate continuously to meet the full chain high-voltage testing needs from product development, factory quality inspection to third-party certification.
This high-voltage switch comprehensive testing equipment can be widely used in the following typical scenarios:
1. Substation operation and maintenance
Conduct preventive tests or fault diagnosis on SF6 circuit breakers, vacuum switches, GIS, etc. in operation, quickly evaluate mechanical performance and contact status of contacts, and ensure the safety of the power grid.
2. Manufacturing and factory testing of high-voltage switches
In the production line or quality inspection process, full parameter testing is conducted on various types of circuit breakers (including graphite contacts, special structures with closing resistors, etc.) to ensure that the products comply with national standards and industry specifications.
3. Installation and commissioning of power engineering
In the construction or renovation of substation projects, perform functional verification on newly installed high-voltage switchgear before commissioning, including low voltage operation tests, synchronization tests, etc.
4. Electric power research and third-party testing institutions
Used for type testing, technical research, or certification testing, supporting high-precision data acquisition, waveform analysis, and report generation to meet the needs of professional laboratories.
5. Power distribution systems for large industrial and mining enterprises and self owned power plants
Regularly inspect internal high-voltage distribution equipment to promptly detect potential hazards such as contact wear, mechanism jamming, and abnormal circuit resistance, in order to avoid sudden power outages.
✅ The equipment can be used in conventional industrial environments with temperatures ranging from -10 ℃ to 40 ℃ and humidity ≤ 80% RH. It has excellent resistance to electromagnetic interference and can stably and accurately measure even in 500kV live substations, truly achieving "one operation, comprehensive diagnosis".
This high-voltage switch comprehensive testing system is mainly suitable for the following typical application scenarios:
1. Maintenance of power system substations
Conduct regular or post fault mechanical characteristic and circuit resistance tests on SF6 circuit breakers, vacuum switches, GIS combination devices, etc. in operation to ensure reliable opening and closing.
2. Factory inspection of high-voltage switch manufacturers
Used for full parameter quality inspection of various circuit breakers (vacuum, SF6, oil switches, etc.) on production lines, verifying whether the action time, speed, stroke, contact resistance, etc. meet the standards.
3. Installation and commissioning site of power engineering
In the construction of new substations or power grid renovation projects, perform functional verification and low voltage operation tests on newly installed high-voltage switchgear before commissioning.
4. Electric power research and testing institutions
Conduct performance research, type testing, or third-party certification testing on switchgear, and support high-precision data acquisition and waveform analysis.
5. Maintenance of power distribution systems in power plants and large industrial and mining enterprises
Conduct preventive tests on circuit breakers in self owned power plants or industrial high-voltage distribution cabinets to detect potential hazards such as mechanical jamming, contact wear, and poor circuit contact in advance.
✅ The equipment can work stably in a conventional industrial environment with a temperature range of -10 ℃ to 40 ℃ and a humidity of ≤ 80% RH. It has strong anti-interference ability and can accurately measure even near a 500kV live substation, meeting the testing needs of the entire life cycle from manufacturing, installation to operation and maintenance.
The PD Patrol Tester is suitable for the following typical application scenarios and environments:
Substation and distribution room
Conduct live patrol inspection on switch cabinet and GIS composite apparatus in operation without power failure.
Power maintenance and operation&maintenance site
It is used for periodic partial discharge detection of transformer, cable terminal, busbar and other equipment, so as to discover potential insulation hazards in time.
Power equipment manufacturer
The high voltage equipment shall be subject to partial discharge test before delivery to ensure that the product quality meets the standards.
Rail transit and industrial plant area
Detect partial discharge in traction substation and HV distribution system to ensure power supply safety.
Laboratory and Testing Agency
Carry out partial discharge mechanism research, equipment performance verification or third-party inspection and certification.
✅ The equipment can work stably in the conventional industrial or outdoor environment of - 20 ℃ - 50 ℃ and humidity of 10% - 90% (non-condensing). It is light and portable (only 0.85kg) and suitable for mobile inspection and on-site fast diagnosis.
The torsion tester is applicable to the reliability test environment of optical cables, electric wires and cables, communication wires and flexible electronic products, and widely used in:
Cable manufacturer: detect the structural integrity and signal stability of the product under repeated torsion;
Communication equipment laboratory: evaluate the transmission attenuation change of optical fiber under mechanical stress;
Quality inspection and certification organization: carry out torsion resistance verification according to GB/T 7424.2 E7 standard;
R&D and Quality Control Department: simulate the bending scene in actual use and optimize the material and structure design.
Stable operation in normal temperature and humidity industrial or laboratory environment, meeting the requirements of full chain test from R&D to production.
With its high temperature stability, uniform air supply and rugged construction, this high temperature blast oven is suitable for the following specific industrial scenarios:
Manufacturing of electronic components
It is used for drying, aging test and stress screening of PCB, capacitor, resistor and other components.
Hardware plating and surface treatment
Quick drying of workpieces after electroplating, preventing water stain oxidation and improving coating adhesion.
Plastics and mould industry
Pre-dried pellets (e.g. ABS, PC and other hygroscopic materials) to avoid blisters or imperfections during injection molding.
Laboratory and Quality Inspection Center
Material thermostatic drying, moisture determination, heat treatment test and sample pretreatment.
Production of auto parts
Curing, drying or heat resistance test of brake pad, sensor and harness.
Manufacturing of new energy (lithium battery)
The battery pole piece and diaphragm shall be dried before vacuum or under normal pressure to ensure that the moisture content meets the standard.
Disposal of food and pharmaceutical packaging materials
Dehumidification and sterilization auxiliary drying of packaging bottle, aluminum foil and composite film before filling (cleaning requirements shall be met).
✅ Its horizontal forced air supply+high uniformity is especially suitable for placing multi-layer samples or process links with high requirements for temperature consistency.
This product is applicable to power system, high and low voltage switchgear, electrical equipment manufacturing, rail transit, new energy power station and other industrial scenes. It can conduct high-precision contact resistance detection for switches, circuit breakers, cable joints, welding seams, etc. in the normal workshop or site environment with - 10 ℃ - 40 ℃ and humidity<80% RH.
KDSL-82-500A short-time overcurrent tester is applicable to various power and industrial site environments, mainly including:
Substation and power distribution room: used for transformation ratio and polarity verification after installation of current transformer (CT) and short-time overcurrent test of relay protection device;
Power construction and maintenance site: quickly verify CT performance before equipment is put into operation or during maintenance to ensure accurate and reliable protection system;
Electrical equipment manufacturer and laboratory: carry out ex-factory test, metering verification or R&D test of transformer;
Railway, petrochemical, metallurgical, mining and other enterprise owned power stations: used for regular detection and troubleshooting of internal power supply and distribution systems.
The equipment conforms to GB6587.1-86 Group III standard, and can operate stably in indoor and outdoor environment of - 10 ℃ -+50 ℃, humidity ≤ 90% (non-condensing) and altitude below 1500m. It supports AC 220V single-phase power supply and is compact and easy to carry. It is especially suitable for mobile operation and site use with limited space.
KDSL-82-500A short-time overcurrent tester is applicable to various industrial and power field environments, and its main applications include:
Substation and power supply station: used for transformation ratio and polarity verification of current transformer (CT) and short-time overcurrent test of primary bus protection device;
Power engineering and commissioning site: quickly verify CT installation quality in new or reconstructed projects to ensure accurate action of relay protection system;
Manufacturer of electrical equipment: function and accuracy test shall be carried out before ex-factory of transformer, switch cabinet, protection device and other products;
Railway, petrochemical, metallurgical, mining and other industrial and mining enterprises: used for maintenance and overhaul of their own power distribution systems to ensure reliable protection of key equipment under fault current;
Measurement and testing and the third party laboratory: carry out high-accuracy current comparison, transformer verification and other standardized tests.
The equipment conforms to GB6587.1-86 Group III instrument standard, and can work stably in indoor and outdoor environment with temperature of - 10 ℃ -+50 ℃, humidity ≤ 90% (non-condensation) and altitude below 1500m. Integrated structure design, light and portable, support AC 220V single-phase power supply, without complex auxiliary equipment, especially suitable for space limited or mobile operation scenes, is an ideal tool for efficient, safe and accurate on-site electrical test.
KDSL-S500A three-phase large current generator is applicable to a variety of power and industrial test scenarios, and its main application environments include:
Low-voltage complete switchgear manufacturer: used for temperature rise test and type test of GCK, MNS, GGD and other switchgear, meeting the requirements of GB 7251.1-5 standards;
Power system operation&maintenance and inspection center: conduct verification and function test on circuit breaker, thermal relay, contactor and other protection devices in substation, power supply station or maintenance base;
Electrical laboratory and quality inspection organization: carry out type test, ex-factory inspection and third-party certification test of electrical products, and support long-term stable output;
Project commissioning site: it can be deployed in the power distribution room, power plant or construction site, and the installed equipment shall be subject to power-on verification and protection characteristics verification;
University and scientific research unit: used for teaching demonstration or research on thermal effect and current-carrying capacity of electrical equipment.
The working environment of the equipment is wide (- 10 ℃ -+50 ℃, humidity ≤ 90% non-condensation, altitude ≤ 1500 m), with IP20 protection grade and forced air cooling system, which can operate stably for a long time in the normal indoor industrial environment, and also suitable for temporary outdoor operation. Its high-precision, strong anti-jamming capability and full-automatic control characteristics ensure that the high-current test task can still be completed safely and efficiently in a complex electromagnetic environment.
Introduction to Application Environment of KDSL-S500A Three-phase Large Current Generator (simplified version)
KDSL-S500A three-phase large current generator is applicable to the site and laboratory environment of power system, industrial and mining enterprises, electrical equipment manufacturing and testing units, and is mainly used for power-on verification and overload/short circuit characteristic test of thermal relay, motor protector, circuit breaker, contactor, switch cabinet, protection panel and other equipment.
The equipment conforms to GB6587.1-86 Group III instrument standard, can operate stably in indoor or outdoor conventional environment, and adapt to substation, distribution room, maintenance workshop, commissioning site and other working conditions. It is small in size, light in weight, strong in anti-jamming capability, supports AC 380V/220V three-phase four-wire power supply, outputs 0~500A continuously adjustable standard sine wave large current, meets the test requirements of high accuracy (0.5 level) and high stability (current stability of 0.5%), and is an ideal tool for verification and function verification of electrical protection devices.
Application Environment of KDJS-8A Intelligent Insulating Gloves/Shoes Withstand Voltage Test Device (simple version)
KDJS-8A intelligent insulating gloves/boots withstand voltage test device is specially designed for preventive test of power system safety tools and widely used in the following scenes:
Power supply bureau, substation and power plant: it is used to regularly test the withstand voltage performance of insulation gloves, insulation boots and other personal protective equipment to ensure the personal safety of operators;
Power maintenance and operation center: carry out batch automatic withstand voltage test for insulating tools and instruments in use every half a year according to the requirements of Preventive Test Procedures for Electric Safety Tools and Instruments;
Safety tools testing station or the third party laboratory: as a standardized testing equipment, it meets the requirements of multi-channel synchronous testing, automatic data recording and tracing;
Electric power construction and engineering unit: carry out quick acceptance or re-inspection on the construction site or warehouse for newly purchased or in-service insulating articles;
Universities and scientific research institutions: used for electrical safety teaching demonstration or insulation material performance research.
The equipment supports dry test (insulating boots) and wet test (insulating gloves) modes, and is equipped with automatic water injection, wireless leakage current monitoring, over-current and over-voltage protection, etc. It can operate stably in the indoor laboratory or on the mobile detection vehicle, adapt to the normal temperature and humidity environment, operate safely and efficiently, and fully meet the "batch, intelligent and compliance" detection requirements of insulation protection articles in the power industry.
KDSF-300 SF6 comprehensive tester is a portable high-precision comprehensive analysis instrument specially designed for detecting the gas state of SF6 electrical equipment in the power system, which is applicable to various severe or complex field and laboratory environments. The main application environments include:
HV/EHV Substation
It is used for daily patrol inspection, handover test and state maintenance of SF6 gas-filled equipment such as GIS (gas-insulated metal-enclosed switchgear), GCB (SF6 circuit breaker) and CT/PT (current/voltage transformer).
It can work stably in outdoor or indoor environment of 500kV and above substations and adapt to high temperature, low temperature, humidity change and other climate conditions.
Power plant and power transmission and distribution operation and maintenance site
Periodic gas quality evaluation shall be carried out for SF6 equipment in operation at the step-up station and regional distribution center of the power plant to prevent insulation failure caused by excessive moisture or accumulation of decomposition products.
Power equipment manufacturing and maintenance workshop
SF6 equipment such as transformer and switch cabinet shall be used to verify the gas charging quality, test the tightness and discharge of internal materials before delivery or during the overhaul process, so as to ensure that the products meet the requirements of national standards (such as GB/T 8905 and DL/T 596).
Emergency repair and fault diagnosis scene
When the equipment is abnormal (such as alarm and trip), rush to the site quickly to obtain dew point, purity and decomposition product data synchronously by taking gas once to assist in judging whether there are internal overheating, partial discharge or moisture and improve the fault locating efficiency.
Environmental protection and gas recovery management
In the process of SF6 gas recovery, purification or reuse, it is used to monitor the gas quality, ensure that the recovered gas meets the recharge standard, and help green grid construction and greenhouse gas emission reduction.
Environmental adaptability characteristics:
Wide temperature working range: it can operate normally under the ambient temperature of - 20 ℃ -+50 ℃, meeting the demand of most regions in China in four seasons;
Dust-proof and splash-proof design: good protection grade, suitable for outdoor substation dust, light rain mist and other complex working conditions;
No external air source or power supply required: built-in battery power supply, supporting independent operation on site, especially applicable to GIS bay area without power supply or limited space;
Strong anti-electromagnetic interference capability: the measurement stability can still be guaranteed under strong electromagnetic field environment (such as close to the high-voltage bus in operation).
To sum up, KDSF-300 SF6 comprehensive tester has become an indispensable core testing tool in the whole life cycle management of SF6 equipment of power system due to its multi-function integration, high reliability and strong environmental adaptability.
This instrument is a multi-functional measuring instrument, equivalent to four conventional test instruments: active transformer capacity tester+transformer characteristic parameter tester+transformer DC resistance tester+transformer material analyzer. It can accurately measure a series of power frequency parameters such as material, capacity, type, no-load current, no-load loss, load loss, impedance voltage and DC resistance of various transformers.
This product has many advantages such as small size, light weight, high measurement accuracy, good stability and simple operation. It can completely replace the previous method of measuring transformer loss and capacity with multi-meter method. The wiring is simpler, the testing and recording are more convenient, and your work efficiency is greatly improved.
